Study On Economic Evaluation Of Geotheermal Energy Developing And Utilizing

The geothermal resource is one of the import energies in the current technical economy and under the geology environmental condition.The geothermal energy in underground rock and heat energy with other useful containment in geothermal fluid can be reasonable developed under earth’s crust surface in certain depth. The heat energy of geothermal resource partly originates from the Earth deep place high temperature lava body. Another originates the heat which produces to the radio active element decay.The geothermal resource is one of the new energies in energy family. It is not only the important energy class minerals, also is renewable, clean, the environmental friendly and green energy. The reasonable use geothermal resource is important strategic action which can alleviate the resources restraint and the environment pressure, improve the quality and the benefit which the economy grows, the realization save the development, the clean development, the safe development and the sustainable development, the adjustment and the optimized energy structure, vigorously develops the new energy, an implementation energy supply multiplication.As a green and renewable resource, geothermal energy has been deeply developed and utilizated in China which is rich in geothermal energy. China has been basically formed a utilization pattern that represented by Tibet Yangbajing geothermal power generation, Tianjin and Xi’an as the representative of the geothermal heating, southeast coast as the representative of the spa and tourism and north China plain as the representative of the planting and breeding. With the acceleration of commercialization, industrialization and large scale of geothermal resources in our country, the importance of economic evaluation for geothermal resources exploitation and utilization also gradually revealed.At present, the research about economic evaluation for geothermal exploitation and utilization is still in its infancy. The limitations of the research mainly displays in the following aspects:firstly, research methods and research depth needs to be further strengthened. From the current situation,there are lots of economic evaluation on energy both at home and abord, but they mostly research on the traditional fossil energy, there are also have reseach on new energy, but most of these studies only for one specific project itself which is made several indicators of the operation and evaluation or made different schemes,simple comparison of the calculation results.they research isarathernebulousterm and not formed a system of evaluation indexs and evaluation method. Secondly, the object of the research should be refined. Currently, economic evaluation is mostly focus on the economic evaluation on energy projects or different usepatterns. They only research on which projects is better through the comparison of the calculated results, key influencing factors for the advantage or disadvantage are not concrete.Thirdly,The use patten of geothermal resources have their own characteristics, the economic evaluation of the results are often not able to fully reflect the real situation of each project.This papers from the angle of view of development and utilization status of the existing evaluation about geothermal resources, combining resources-economy-environment system, based on DEA model, combining with the development and utilization of geothermal resources mainly, completed the transition from theory to practice, form method to practice. Provides scientific date to the goverments for the management and decision made which is benifent to the exploitation and utilization for geothermal resource.1. Making research on theories of economic evaluation of geotheermal energy developing and utilizing. This paper given summarized study on the key influential factors and current situation of geotheermal energy developing and utilizing, the theory of mineral resources developing and utilizing is reviewed in this chapter.Combining with the characteristics of geothermal resources development and utilization, making comprehensive analysis of the main influence factors of geothermal resources economic evaluation and it found out that the geological factor, the technical economic factors, social economic factors and ecological and environmental factors will affect the economic value of exploitation and utilization of geothermal resources. It provides a theoretical basis for choosing economic evaluation index of geothermal resources development and utilization based on DEA model.2.making systmical analysis on the different ways of development and utilization of geothermal resources.it makes analysis respectively on the three main use of low temperature geothermal resources,there aredeep geothermal water heating, shallow geothermal heating and geothermal hot springs.Analysis shows that the three ways of evaluate the development and utilization project have their priorities. Deep geothermal water heating projects need large investment have high risk, therefore,it focus on the financial data such as net present value calculation; economic evaluation on shallow geothermal project should pay attention to for its energy saving effect evaluation; Evaluation of geothermal hot springs is mainly to evaluate the main factors influencing the hot spring development and utilization. Through the analysis, it found out, most economic evaluation of geothermal resources focus on a single project, the lack of a variety of different ways of development and utilization in macroscopic views.it put forward the necessity of setting up economic evaluation model of geothermal resources exploitation and utilization.3. Set up economic evaluation index system of geothermal resources development and utilization based on3E-DEA.On the basis of analyzing the theory of energy-environment-economy system, refining the index of resources with geothermal energy, coupling the relationship between economy and environment.summaried the main models and methods of energy-environment-economy system and finding out the model method’s limitations. From the perspective of the relations between the inputs-output, by using DEA model make economic evaluation on the development and utilization of geothermal resources. Choicing the suitable DEA model which were used in this article, there are economic evaluation index system of geothermal resources development and utilization based on3E-DEA and Super efficiency DEA model. Super efficiency model is used to solve unit scheduling problem which is with relatively few cases. Focus on the two economic indicators:costs and yields. Geothermal cost including environmental cost; through adjustment of the economic parameters, studied the two influence factor to geothermal development such as cost and investment. Constructing suitable index system to meet the characteristics of the geothermal resources, expand the limitations of the traditional project economic evaluation method which making economic evaluation about geothermal resources development and utilization is more scientific. Through empirical analysis to the key influencing factors of geothermal resources exploitation and utilization, to make a evaluation of the development and utilization of geothermal resources from a more macro point of view. The five indicators have been fully tested in the influencing factors of geothermal exploitation and utilization and combining with the connotation of resources-economy environment, have certainscientificalness. According to the main factors influencing the value of geothermal resources development and utilization project, combined with the connotation of the3E and DEA evaluation model a newly established index system is established, through a practical example, the model was used to study the different ways of using geothermal development project plan, analysis the key factors which impacts the evaluation about geothermal resources development and utilization, to make a evaluation of the development and utilization of geothermal resources from a more macro point of view.Explore index system of economic evaluation which is suited to the characteristics of the geothermal resources development and utilization project, expand the limitations of the traditional economic evaluation method on project and makes the economic evaluation on geothermal resources development and utilization more scientific.4.Using data envelopment analysis setting up economic evaluation model of geotheermal energy developing and utilizing.according to the different ways and utilization of geothermal resources, selectted10representative projects including high-temperature geothermalwater,shallow geotheermal energyand hot spring projects as the research objects (namely decision-making unit), and then makes input-output research based on the evaluation model.The key point to a model lies in the choice of indicators, combining with the characteristics of geothermal, this article selects the single well production, total investment, dynamic payback period, financial internal rate of return and environmental benefits as input and output indicators. On the basis of previous research, using FA software to evaluate the efficiency of geothermal resources development and utilization then makes efficiency analysis on the operation results. According to the FA software there are2DEA effective project and8DEA invalid projects. The output shows the score of economic efficiency, and contribution to value analysis based on economic efficiency project, finds out the causes which makes the economic efficiency low. Loss phenomenon is widespread in the input level. There is cetain degree rise space in the output indicators.5. Optimization path of exploitation and utilization of geothermal resources in China is put forward.on the views of porject,promoting the coordinated development of the geothermal resources-economy-environment, there are multi-purpose on the resource, cascade utilization and geothermal injection to improve the efficiency of geothermal resources and technology actively;on the views of industry level, by conducting investigation and evaluation on geothermal resources,to plan the geothermal industry reasonablely and to set up the geothermal industry investment fund to safeguard geothermal resources-environment-economy coordinating developed.The innovation of this paper is mainly indicated on two aspects as follows:1.According to the characteristics of geothermal resources, combing with Resources-economy-environment system,selection scientific input and output index, setting up economic evaluation model of geothermal resources development and utilization based on3E-super efficiency DEA.2. Making economic evaluation and economic efficiency evaluation in view of the different ways of using low-temperature geothermal resources:deep geothermal water heating, shallow geothermal heating and hot spring tourism.